If you’ve lived in at least one house equipment in your life, you’ll believe what I’m referring to when I talk about the air handler closet. It’s the one closet in the house that has a metal door, instead of wood or any other material. This closet is where the air handler is kept, which is the interior portion of a chop air conditioner! Normally, the closet for the air handler is just big enough to house the handler & possibly the water heater. You could use the space for storage, even though I wouldn’t request it – here’s why, last warm season, I used the air handler closet to store a few folding chairs & some tarps for outdoor use; My air conditioner plan coincidentally started to put out worsening air quality each day since I put those things in the closet, even though I never made the connection in our head! Eventually, after numerous weeks of a gradual decline in our indoor air conditions, the air conditioning plan completely died on me. I had no plan what caused this, until a certified heating, ventilation, & A/C professional came to the house on behalf of the property management. The first site he looked was, of course, the air handler closet. When he saw the tarps & chairs blockading the air handler, he couldn’t help however laugh! He turned to me, explaining that this was a huge no-no when tending to the heating & air conditioner plan in an apartment. “You’re lucky”, he explained, “this could have caused drastic water destruction in your apartment!” Apparently the drip pan for the air conditioning plan was also in this closet, & it was full to the brim with condensate from the air conditioner unit, he was right – I actually was lucky this didn’t get worse!